Saving .wav file

Question

TAN KYE JYEN 2021-5-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/825745-saving-wav-file

评论： Rik 2021-5-10

Hi everyone, recently I designed a song maker using GUIDE and was required to simple music notes into the song maker. I tried to save the notes into a .wav file but was having problem as the notes keep replacing existing notes, thus only one latest note was successfully saved. May I know how to save few notes into a single .wav file? Attached is the code I wrote for the note 'A' the audiowrite function was used. Thanks in advance :)

% --- Executes on button press in A1.
function A1_Callback(hObject, eventdata, handles)
 Fs=8000;
 Ts=1/Fs;
 t=[0:Ts:3];
 F_A=440; 
 A=sin(2*pi*F_A*t);
 sound(A,Fs);
 filename = ('C:\Users\Song.wav');
 audiowrite(filename,A,Fs);
 clear A Fs
% hObject    handle to A1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

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Answer 1

Rik 2021-5-9

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https://ww2.mathworks.cn/matlabcentral/answers/825745-saving-wav-file#answer_695575

You're overwriting the song every time this callback is triggered. You should probably store each note to a field of your guidata struct to be able to write your sequence of notes to a wav file.

For general advice and examples for how to create a GUI (and avoid using GUIDE), have look at this thread.

You should also consider moving most of this code to a separate function. The only thing specific to this note is the frequency, so you should probably use a separate function that accepts the frequency and the handles struct as inputs. That will also allow you to change the path to which the file is written more easily.